Open Access

Two-Stage Interpolation Algorithm Based on Fuzzy Logics and Edges Features for Image Zooming

EURASIP Journal on Advances in Signal Processing20092009:372180

Received: 18 February 2009

Accepted: 26 August 2009

Published: 15 October 2009


This work presents an innovative two-stage interpolation algorithm for image resolution enhancement and zooming applications. The desired high-resolution images are obtained via two interpolative stages. In the first stage, aligned pixels are first estimated using a fuzzy inference system, whose critical parameters are optimized by particle swarm intelligence. In the second stage, interior pixels are then restored by utilizing the edge properties of nearby pixels. From experimental results, numerical comparison confirms the superiority of the proposed interpolation algorithm over other existing methods. Furthermore, visual illustrations including zoomed parts and error maps demonstrate the significant improvement of the proposed method, particularly in the regions that contain many local edges and sharp details.

Publisher note

To access the full article, please see PDF.

Authors’ Affiliations

Department of Electrical Engineering, National Central University
Department of Electrical Engineering, National Taipei University of Technology


© H.-C. Chen and W.-J. Wang. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.